Pavement surface-sealer applying machine



1966 c. E. GIFFORD ETAL 3,

PAVEMENT SURFACE-SEALER APPLYING MACHINE Filed Dec. 14, 1964 6Sheets-Sheet 1 INVENTORS CLAYTON E. GIFFORD WILLIAM E. LINKOUS BY DONALDT. LINKOUS MAHONEY. MILLER & RAMBO WVK ATTORNEYS 1966 c. E. GIFFORD ETAL3, 75

PAVEMENT SURFACE-SEALER APPLYING MACHINE 6 Sheets-Sheet 2 Filed Dec. 14,1964 INVENTORS CLAYTON E. GIFFORD WILLIAM E.'LINKOUS By DONALD T.LINKOUS MAHONEY, MILLER & RAMBO ATTORNEYS Nov. 8, 1966 c. E. GIFFORDETAL 3,

PAVEMENT SURFACE'SEALER APPLYING MACHINE Filed Dec. 14, 1964 6Sheets-Sheet 3 I INVENTORS CLAYTON E. GIFFORD WILLIAM E, LINKOUS DONALDT. LINKOUS MAHONEY, MILLER & RAMBO ATTORN EYS Nov. 8, 1966 c. E. GIFFORDETAL 3, 3,6 5

PAVEMENT SURFACE-SEALER APPLYING MACHINE 6 Sheets-Sheet 4 Filed Dec.

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1966 c. E. GIFFORD ETAL 3,

PAVEMENT SURFACE-SEALER APPLYING MACHINE Filed Dec. 14, 1964 6Sheets-Sheet a INVENTORS CLAYTON E.G|FFORD WILLIAM E. LINKOUS BY DONALDT. LINKOUS MAHONEY. MILLER 8. RAMBO ATTO RN EYS United States Patent3,283,675 PAVEMENT SURFACE-SEALER APPLYING MACHINE Clayton E. Gifford,Marion, and William E. Linkous and Donald T. Linkous, Columbus, Ohio,assiguors to Asphalt Sealer Products Company, Inc., Columbus,

Ohio, a corporation of Ohio Filed Dec. 14, 1964, Ser. No. 417,965Claims. (Cl. 9439) This invention relates to a pavement surface-sealerapplying machine. It has to do, more particularly, with a self-propelledmachine which is adapted to move over the surface of a pavement andapply thereto a sealer substance to protect that surface. In itsspecific application, it deals with a machine for applying a bituminoussealer of a semi-liquid or viscous type to the surface of bituminouspavement commonly known as blacktop pavement and spreading the sealerevenly and uniformly over that surface.

According to this invention, there is provided a machine which includesa main frame carried by front and rear Wheels for movement over thesurface to be treated. At least some of these wheels are positivelydriven so that the machine is self-propelled. Preferably, the frontwheel-s are driven and a novel arrangement is provided for driving andsteering those wheels. The frame carries a tank or hopper in which thetreating substance is mixed or agitated, by means of a driven mixer oragitator. Both the propelling wheels and the mixer or agitator arepreferably hydraulically driven. The treating or sealer substancedischarges by gravity from the bottom of the tank under control and isdirected by a novel directing arrangement laterally relative to thelongitudinal center line of the machine which is especially desirable ifthe machine is operating on a laterally crowned or tilted surface. Thematerial is discharged in front of applicator means which is carried ona sub frame that is connected to the main frame so that it will floatrelative thereto. This sub-frame carries one or more transverselyextending leveling squee gees which first act on the treating or sealersubstance to roughly spread and level it. It also carries one or moreapplicator brushes which extend transversely behind the forwardsqueegees and which are reciprocated or oscillated transversely so as tobrush effectively the treating or sealer substance into irregularitiesof the pavement surface. A final squeegee, which is preferably angularlyadjustable about a vertical axis, may be provided behind the brush toimpart a final smooth surface to the sealer coating. The entiresub-frame or applicator sub-assembly is connected to the main frame bylifting means which normally permit it to fioat relative to the mainframe but which can be actuated to lift the assembly for propertransporting or traveling clearance. This lifting arrangement is alsopreferably hydraulically actuated.

Various other objects and advantages of this machine will be apparentfrom the drawings and the following description.

The accompanying drawings illustrate a preferred form of machineembodying the principles of this invention but it is to be understoodthat specific details may be varied. 1

In these drawings:

FIGURE 1 is a front perspective view of the machine.

FIGURE 2 is a front elevational View of the machine showing particularlythe front Wheel mounting and steering arrangement.

FIGURE 3 is a rear perspective view showing particularly the levelingsqueegee and applicator brush assembly.

FIGURE 4 is an enlarged side elevational view of the structure shown inFIGURE 3.

Patented Nov. 8, I966 FIGURE 5 is a horizontal sectional view takenalong line 55 of FIGURE 4.

FIGURE 6 is an enlarged detail in vertical section taken along line 66of FIGURE 4.

FIGURE 7 is a vertical sectional view taken along line 7-7 of FIGURE 6through the brush and its mounting means.

FIGURE 8 is a similar view taken along line 8-8 of FIGURE 6.

FIGURE 9 is an enlarged vertical longitudinal sectional view taken alongline 9*9 of FIGURE 6.

FIGURE 10 is a detail in transverse vertical section taken along line10-10 of FIGURE 9.

With reference to the drawings, the machine embodying the presentinvention is shown in FIGURES 1 and 2 as comprising a main frame,suitably fabricated from steel frame members, and indicated generally bythe numeral 20. This main frame carries a box-like housing 21,preferably formed of steel plates, within which a tank for the treatingor sealing substance is provided and which preferably encloses aninternal combustion power unit 22 or engine illustrated schematically inFIGURE 3 along with an associated hydraulic pump and other portions ofthe power and hydraulic system, the details of which are not importantto the present invention.

The housing 21 preferably has the tank 23 formed at its forward end in asuitable manner, as shown in FIGURE 4, with the rear wall 24 and thebottom wall 25 being inclined rearwardly in converging relationship todirect the substance therein toward an outlet controlled by a suitablevalve 26 which may comprise a plate or disc 26 (FIGURE 4) pivoted at26a, and actuated by the bar 19 which runs rearwardly under the frame 20and is pivoted at 18 to a control handle 17. Within the tank is a mixeror agitator 27 which is preferably driven by a hydraulic motor indicatedat 28.

The frame 20 projects rearwardly from the housing 21 and on thisprojecting portion of the frame an operators seat 29 is provided. Fromthis seat, the operator can see over the housing 21 and can operate thevarious controls for the machine which are conveniently located relativethereto.

The frame 20 is supported by a front wheel assembly 30 (FIGURES 1 and 2)which includes the pair' of driven Wheels 31 and a rear wheel assemblywhich includes the pairs of idler Wheels 32 (FIGURES 5 and 6) which aremounted on a transverse axle 33 that extends transversely below and issuitably connected to the main frame 20 as shown.

The front wheel assembly 30, as shown best in FIG- URES l and 2,includes a sub-frame mounted for vertical pivotal movement in atransverse plane about a pivot axis extending longitudinally of theframe 20 of the machine just above that frame. This sub-frame includesthe upright transversely disposed plate 35 which is fiat against thefront wall of the housing 21 and is carried thereby by means of a pivotstructure 36. The plate 35 has beveled upper corners 37 and associatedwith these corners are guide brackets or clips 38 which are fastened tothe front wall of the housing 21 by the bolts and spacers 39 but extendlaterally inwardly over the face of the plate 35. These permit theswinging movement of the plate 35 about the axis of the pivot 36 butprevent forward tilting of the plate away from the housing. Verticalswinging movement of the plate 35 is limited by the stops provided bythe bolts and spacers 39.

At each outer side edge of the plate 35 an upright cylindrical spindlehousing or bearing 40 is welded or otherwise secured thereto. Eachhousing rotatably receives the upright yoke spindle 41 which is suitablyrotatably supported therein. The lower end of the spindle projects fromthe cylinder 40 and carries a yoke or fork 42 which straddles theassociated wheel 31 and carries the transverse axle 43 upon which thewheel is rotatably mounted. Each wheel 31 has bolted thereto a largesprocket 44, driven by a sprocket chain 45 from a smaller sprocket 46whichris keyed on the drive shaft of a suitable hydraulic motor 48. Eachmotor 48 is carried on the upper portion of the associated yoke or fork42.

The lower end of each spindle 41, below the cylinder 40, has keyedthereto a sprocket 49. A sprocket chain 52 has its ends wrapped aroundthe associated sprockets 49 and suitably anchored thereto. This chainpasses around and in mesh with the forward side of a central segmentalsprocket 50. The chain 52 is preferably provided with take-upturnbuckles 51 connected therein between each sprocket 49 and thesegmental sprocket 50. The segmental sprocket 50 is keyed on the upperend of a sleeve 54 which is mounted for rotation on the upright pivotpin 53 rigidly carried by a bracket 55 that projects forwardly from thefront wheel assembly 30. The lower end of the rock sleeve 54 has a rockarm 55a extending rigidly outwardly therefrom which has its outer endpivoted by a universal joint 56, such as a ball joint, to controllinkage 57. This linkage 57 leads rearwardly under the frame to aconnection with the vertical steering column 58 (FIGURE 3) which isprovided with the steering wheel 59 on its upper end.

It will be apparent that with this arrangement, turning the steeringwheel 59 will rock the arm 55a which will, in turn, rock the segmentalsprocket 50. This, in turn, will drive the chain 52 in one direction orthe other and consequently will turn the sprockets 49 in a correspondingdirection thereby rotating the spindles 41 in the housings 40 bothsimultaneously in the same direction. Thus, steering is controlled bythe wheel 59 which simultaneously turns both wheels 31 in the samedirection about the vertical axes of the respective spindles 41 whichcarry them. Driving of the wheels 31 is accomplished by controlling thehydraulic motors 48 which drive them and which may be simultaneouslycontrolled by a valve (not shown) located adjacent the drivers seat 29.

The rear wheels 32 are mounted in the manner indicated in FIGURES 4, 5,and 6. The axle 33 is attached to the frame 20 by means of dependingsupports 61.

' As previously indicated, the outlet valve 26 is controlled from apoint adjacent the drivers seat by means of the control handle 17. Thetreating substance leaving the tank outlet under control of the valve 26drops into a directing chute or trough 60 shown best in FIGURES 4 and 5.The valve 26 and associated tank outlet are located midway laterally ofthe tank and the trough 60 is pivoted directly below it for lateralswinging movement about a vertical axis. For this purpose the pivot 62is provided directly adjacent the Wall 24 on the bottom 25 of the tankand may comprise a hook and eye which suspends the forward end of thetrough in such a manner as to permit lateral swinging of the rear endthereof. The trough 60 is fan-shaped with a diverging rear end and issupported in rearwardly and downwardly inclined position on the frame20, the pivot mounting 62 permitting this inclination. The rear end issupported for the lateral swinging movement by means of a rigidupstanding loop 63 on the trough. This loop straddles a transverse rigidsupport rod 64 which is supported at a level below the main part of theframe 20, in laterally extending relationship thereto, by means of apair of depending bracket supports 65 which depend from the oppositeouter side members of the frame. A rigid control bar 66 has its forwardend rigidly connected to the rear. end of the chute and extendsrearwardly of the chute from its rear end, which is forward of the axle33, over the axle and beneath the housing 21 to a point adjacent thedrivers seat. By means of a handle 67 (FIGURE 3), this bar may be movedlaterally to swing the directing chute 60 laterally about its pivot 62.The loop 63 extends sufiiciently longi- A. tudinally of the frame 2 9and transversely of the support bar 64 to permit this swinging movementabout the pivot 62.

The applicator or spreader means of this machine is formed as asubstantially separate unit which is indicated generally by the numeral7 t) and includes a sub-frame that is disposed below and is pulled alongby the main frame 29 to which it is connected for relative floatingmovement. This unit or sub-assembly is illustrated best in FIGURES 3-10.

The sub-frame includes a pair of longitudinally extending laterallyspaced parallel outer side members 71 which extend longitudinally of themachine. This subframe has its rear end connected to the frame 26 sothat it will be pulled therealong thereby by means of verticallyswingable parallel linkage at each side of the frame and which includesa lower link 72 and an upper link 73. The lower link 72 is pivoted atits forward end at a pivot point 74 to the rear end of the associatedside frame member 70 and is pivoted at its rear end at a pivot point 75to the lower end of the support bracket 65 which rigidly depends fromthe frame 20 just ahead of the tank wall 24. The upper link 73 ispivoted at its forward end by a pivot 76 to the upstanding bracket 77which is rigidly fastened on the upper edge of the member 70 at its rearend. The rear end of this link 73 is pivoted at 78 to the upper end ofthe support bracket 65. Thus, the unit or sub-frame assembly 70 will belocated below the main frame 20 and will be pulled along therewith bythe parallel linkage trough connection and will be capable of verticalfloating movement relative to the frame 2% It will be noted best inFIGURE 4 that this sub-frame 71) extends rearwardly beyond the frame 20.It is provided with a triangular rear extension 89 to which is rigidlyconnected at its vertex an upstanding stopcarrying frame portion 31which has a forward extending portion that carries a stop-screw 82. Thisstop-screw 82 is adapted to be disposed over and to engage a stop bar 83which is provided on the upper surface of the frame 20 at its rear endand may be the support on which the seat pedestal 84 is mounted. Thus,the downward extent of the movement of the frame 70 relative to theframe it) may be limited by the setting of the stopscrew 82.

The frame 70 will move vertically parallel to the main frame 20 becauseof the provision of the parallel linkage. To lift the frame 70 forproper traveling clearance, when desired, a hydraulic liftingarrangement is provided which is shown best in FIGURES 3 and 4. Thus,there is provided at each side of the frame 2%, the vertically swingablelifting arms 85 which are keyed on the outer ends of a transverselydisposed shaft 86 that is rotatably carried by bearings 87 carried onthe frame 20. The outer ends of the crank arms 85 are connected to theside members 71 of the frame 70 by the pivoted lifting links 88. Arocker arm 89 is keyed to the shaft 86 and is rocked by means of ahydraulic cylinder and piston unit or ram 90 carried by the frame 20 andwhich may be suitably controlled. By actuating the ram 90, the frame 70may be lifted or lowered relative to the frame 20.

At the vertex of the frame extension 80 there is also a rotatable shaft91 which has its lower end supported by that extension and its upper endrotatably supported by a segmental plate 92 rigidly secured in positionon the upper end of the frame portion 81. An adjusting handle 93 iskeyed on the upper end of the shaft 91 and sweeps over the plate 92being provided with a removable pin 94 for selectively cooperating withany of a series of openings 94a arranged arcuately of the plate 92. Thelower end of this shaft 91 is keyed to a bracket 97a which is adapted toadjustably carry the final squeegee 95. This squeegee may be a flexibleblade made of rubber or plastic and carried by an angle bar 96. Thisangle bar is provided midway of its ends with a pair of upstanding lugs97 which are rigidly secured thereto and straddle the brackets 97a. Thelugs 97 are pivoted adjacent their rear lower corners by the opposedpivots 98 to the bracket 94 and each is provided with a series ofopenings 99, opposite the pivot 98, for selectively receiving a pin 101passed through an opening in the lug. Thus, the squeegee asembly may betilted about the axis of the pivots 98 and locked in adjustably tiltedposition by the pin 101.

Ahead of the squeegee 95 on the sub-frame 70 is the transverselydisposed, oscillatable or reciprocable brush assembly 100, which isshown best in FIGURES 38, inclusive. This assembly 100 includes thebrush member itself 102 which is removably received on transverse pins103 (FIGURE 8) projecting laterally from a support bar 104. This bar 104is disposed on edge and is rig dly secured to a reciprocable bar 105 atone edge thereof and in depending relationship thereto. This bar 105carries a retaining clip 106 of inverted U-form toward each of its endswhich straddles the bars 105 and 104 and holds the brush 100 on the pins103. Each clip 106 is of resilient material and is rigidly attached to ametal strip 108 which extends longitudinally of the bar 105 and normallyrests thereon. A handle loop 107 is attached to the strip 108 and may beused for swinging it about its pivotal connection 109, at its inner end,to the upstanding lug 116 which projects upwardly from the bar 105midway of its ends. The clips 106 resiliently straddle the brush 102 andhold it in place but can be moved upwardly out of the way by means ofthe handles 107 to permit removal and replacement of the brush.

The ends of the bar 105 (FIGURES 4 and 6) extend slidably outwardlythrough guides 110, each of which is carried at the lower edge of theassociated side frame member 71 of the sub-frame 70, the upper portionof the body of the brush being cut away at 111 so as not to interferewith the associated guide. Each of the outer ends of the bar 105 isconnected by a vertical pivot pin 112 to the forward end of a push-yoke113. The rear end of this yoke is pivoted by a universal 114 (FIGURE 4)to a lug 117 on the outer end of a transverse brace 118 attached to therear ends of the side frame members 71. The bar 105 is free to movevertically in the guides 110 to provide for limited yielding upwardmovement of the brush 102 as it engages the coated surface. The yokes113 will keep the brush substantially upright and will exert a forwardthrust thereon and reciprocation of the brush will be permitted sincethe bar 105 will be able to slide in the guides 110 longitudinally ofitself as well as be able to move laterally of itself in the guides 110and the universal joints 114 will permit both horizontal and verticalswinging of the yokes 113.

For reciprocating the bar 105 and the brush 102 which it carries, anovel cam-actuated arrangement is provided which is con-trolled byrotation of the rear wheels 32 so that the speed of brush reciprocationwill vary as the speed of travel of the machine varies. Thisreciprocating means comprises a connecting rod 115 (FIGURE 6) disposedtransversely above the bar 105 and having its inner and lower endpivoted at a horizontal pivot 119 to the lug 116 upstanding from the bar105. The outer end of this rod 115 is pivoted at a horizontal pivot 120to the lower end of a higid arm portion 121b depending from the rockerbeam 121. This beam 121 is located inwardly of one of the side members aof the frame 20 and is pivoted for swinging movement in and out in ahorizontal plane relative to that member by means of a vertical pivot122 (FIGURE 9) located toward its forward end which is carried by abracket 123 attached to the side member 20a at the inner side thereof.At the rear end of this beam 121, between it and the member 20a, is acompression spring 124 which normally swings its rear end inwardly andits forward end outwardly. This forward end is provided with adownwardly inclined portion 121a which carries on its lower end a camfollower roller 125 which engages the cam edge of an annular cam flange126 that surrounds the hub of the associated wheel 32. Thus, when thewheel rotates, it will rock the beam 121, about its pivot 122, which,through the connecting rod 115, will reciprocate the brush unit 100.

One or more squeegees is provided ahead of the brush unit to spread andlevel the coating material in a preliminary manner. In the drawings, inFIGURES 35 and 9, a single squeegee 130 is provided. This squeegeeextends transversely below the frame 70 and is provided with forwardlyturned ends 131 to confine the material as it is spread across thesurface, this being the material which is deposited from the chute 60 infront of the squeegee. This squeegee comprises a metal angle member 132which carries a flexible squeegee block of rubber or the like. Thisangle member is rigidly connected to the lower ends of angle brackets133 disposed directly outwardly of the side frame members 71 andextending upwardly thereabove. This member 133 is connected by means offorwardly extending, parallel upper and lower thrust links 134 at eachside of the frame 70 to an associated upstanding bracket 135 rigidlycarried on the forward end of the side member 71. The links 134 includeadjustable turnbuckles and have simple horizontal pivots 136 at theirrear ends and universal pivots 137 at their forward ends. By means ofthese links 134 at the opposed ends of the squeegee 130, it may beadjusted to an upright position and will be maintained in that positioneven though it is free to float vertically because of the parallellinkage. Downward movement of the squeegee 130 is limited by stop screws140 (FIGURES 9 and 10) carried by angle clips 141 secured to the innersides of the members 133. These screws 140 will engage with the upperedges of the associated side frame members 71.

In the use of this machine, the proper coating material will be suppliedto the tank 23 and will usually be a liquid sealer which may have sandor other material added thereto. The hydraulic motor 28, which drivesthe mixer or agitator 27, will be actuated and the machine will bepropelled along by actuating the hydraulic drive motors 48. The ram 90will be actuated to lower the sub-frame 70 so that the brush unit 100and the squeegees 95 and 130 will contact with the surface to betreated. The material-directing trough 60 will be swung to the properlateral position to direct the material flowing from the outlet of thetank 23 in the desired direction. The flow of this material will becontrolled by opening or closing the valve 26 from time to time. Also,the direction of flow may be varied from time to time by a change in theposition of the trough 60. This will permit directing the liquid orsemi-liquid material to the higher side of a surface if it is tiltedtransversely. As the machine moves along, the rotation of the cam 126with one of the wheels 32 will swing the rocker beam 121 laterally whichwill produce reciprocation of the brush 102. The sealer material will bedeposited in front of the squeegee 130 and will be roughly spreadlaterally thereby, spreading being limited by the forwardly extendingends 131 of the squeegee. This squeegee will be permitted to floatvertically because of the provision of the parallel linkage 134. Thespread material will next be acted upon by the transverselyreciprocating brush 100. This brush is also free to float vertically toa limited extent and the sealer will be worked into any irregularitiesof the surface. Finally, the spread and worked sealer material will beacted upon by the squeegee 95 which will finally smooth and level it.This squeegee 95 may be angled rearwardly towards one side or the otherto direct excess material laterally to one side off the surface. Theentire applicator assembly, including the squeegees and the brush, iscarried by the frame 70 and this frame is free to move Vertically in itsentirety relative to the frame 20. When it is desired to move themachine to a different location, the ram 90 may be actuated to lift theunit 70 so that the squeegees and brush will not contact with thesurface.

In moving over the surface, the front driving wheels 31 can pivot as aunit about the horizontal pivot 36, it being understood that they arecarried on the frame 35 for this purpose. This transverse pivoting orswinging of the wheel-carrying frame 35 will insure firm driving contactof both front wheels with the surface over which the material travelseven if one or the other rides over a bump or into a depression. Thewheels 31 are positively driven by the hydraulic motors 48 and they aresteered by means of the steering wheel 59 which actuates the chain 52and associated sprockets to turn the wheels about the axes of thevertical spindles 41.

It will be apparent from the above that this invention provides for anovel machine which will effectively spread sealer material overpavement surfaces. Many advantages of this machine have been discussedand others will be apparent.

Having thus described this invention, what is claimed is:

1. A machine for applying a viscous treating substance to a surface overwhich it is adapted to move comprising a frame carried by Wheels formovement along the surface to be treated, means on the frame fordepositing the treating substance on said surface, brush means forworking said deposited substance on the surface, means for mounting saidbrush means on the frame behind said depositing means for reciprocationtransversely of the frame and relative to the normal path of movementthereof, and means for reciprocating said brush means and ineluding cammeans actuated by the rotation of at least one of said wheels, said cammeans comprising a cam rotatable with the wheel, a cam follower engagingsaid cam and an operative connection between said follower and saidbrush means.

2. A machine according to claim 1 in which the wheel is rotatable aboutan axle extending transversely of the frame, said cam being an annularcam which surrounds said axle, said cam having a cam edge, said followerembodying a roller engaging said cam edge, said operative connectioncomprising a beam extending longitudinally of the frame and mountedthereon for transverse rocking movement and carrying said roller on oneof its ends adjacent said cam, and a connecting rod connecting theopposite end of the beam to said brush means.

3. A machine according to claim 1 in which said means for depositing thetreating substance on the surface comprises a tank having a dischargeoutlet with means below the outlet for directing the substance, saidmeans being adjustable laterally to direct the substance laterallyrelative to the direction of normal movement of the machine.

4. A machine according to claim 3 in which said directing meanscomprises a chute pivotally mounted on the frame so that its forward endcan be adjusted laterally in either direction from a central forwardlyextending position.

5. A machine according to claim 1 including a squeegee carried by saidmachine following said depositing means and ahead of said brush meansand extending transverse- 1y of the frame, said squeegee havingforwardly turned end portions to limit spreading of the substance by thesqueegee.

6. A machine according to claim 4 in which another squeegee is disposedon said machine behind said brush means, said last-named squeegee beingmounted for adjustable movement about a vertical axis, and means forretaining the squeegee in selected adjusted positions.

7. A machine for applying a viscous treating substance to a surface overwhich it is adapted to move comprising a main frame carried bytransporting means for movement along the surface to be treated, saidmain frame carrying a tank for the substance having a downwardlydirected discharge outlet, a subframe disposed below the main frame,means connecting the sub frame to the main frame so that it will movealong therewith but will be free to move vertically relative thereto,brush "means mounted on said sub-frame for reciprocation transverselyrelative thereto, and cam means actuated in response to actuation ofsaid transporting means and operatively connected to said brush means toproduce reciprocation thereof as the machine moves along said surfaceand in timed relationship thereto, said transporting means comprising apair of rear wheels and a pair of forward wheels, said forward wheelsbeing carried on opposite sides of a transversely extending frame, andmeans for mounting said last-named frame on saidwm-ain frame for pivotalmovement about a horizontal axis extending longitudinally of themachine, said front wheels being carried on said last-named frame byvertical spindles at each side of the frame, and means for adjustingboth of said wheels simultaneously about the axes of said spindles tosteer the machine.

8. A machine according to claim 7 in which said front wheels arerotatably mounted in forks carried by said spindles, and hydraulicdriving motors carried by said forks and drivingly connected to saidwheels.

9. A machine according to claim 8 comprising rotatable mixing means insaid tank, and a hydraulic motor for driving said mixing means.

It). A machine according to claim 7 in which said connecting meansbetween the main frame and the sub-frame comprises parallel linkage,means for lifting the sub-frame relative to the main frame for travel,said means comprising lifting arms carried by the main frame andconnected to the sub-frame, a rock shaft for swinging said arms, and ahydraulic ram for actuating said shaft.

11. A machine according to claim 7 comprising a downwardly inclineddirecting chute disposed below said tank outlet, and means for pivotallymounting the forward end of said chute and laterally adjustablysupporting the rear end of said chute on said frame for lateral swingingmovement.

12. A machine according to claim 7 including a transversely disposedsqueegee carried by said sub-frame and located between said dischargeoutlet and said brush means, said squeegee having forwardly turned outerends for limiting outward spreading of the treating substance.

13. A machine according to claim 12 including parallel linkage forconnecting said squeegee to said sub-frame, said parallel linkageincluding adjustable turnbuckles and universal joints to permit tiltingadjustment of said squeegee.

14. A machine according to claim 12 including a squeegee located behindsaid brush means and carried by said sub-frame, means for mounting thelast-named squeegee on said sub-frame, said means comprising a verticalpivot structure carried by said sub-frame and about which the squeegeecan be adjusted to angle it transversely of the frame, and means incooperation with said pivot for holding said squeegee in adjustedposition therearound.

15. A machine according to claim 14 in which said squeegee includes aflexible blade and a support attached to said pivot by means permittingtilting adjustment of said support.

16. A machine for applying a viscous treating substance to a surfaceover which it is adapted to moved comprising a main frame carried bytransporting means for movement along the surface to be treated, saidmain frame carrying a tank for the substance having a downwardlydirected discharge outlet, a sub-frame disposed below the main frame,means connecting the sub-frame to the main frame so that it will movealong therewith but will be free to move vertically relative thereto,brush means mounted on said sub-frame for reciprocation transverselyrelative thereto, and cam means actuated in response to actuation ofsaid transporting means and operatively connected to said brush means toproduce reciprocation thereof as the machine moves along said surfaceand in timed relationship thereto, said mounting means for the brushincluding guides for receiving a brush supporting bar to permittransverse guided reciprocation thereof as Well as vertical floatingmovement, and thrust yokes pivoted to the ends of said bar by verticalpivots and pivoted to said sub-frame by universal pivots to permit thetransverse reciprocation of said brush bar as well as vertical movementthereof.

17. A machine according to claim 16 including means for removablysuspending a brush member from said bar.

187 In a machine of the type described a frame supported at its rear bytransporting means, means for supporting the front of the frame, saidmeans comprising a pair of laterally spaced front wheels carried at theouter sides of a sub-frame extending across the front of said mainframe, and means for pivotally connecting said subframe to the mainframe for pivotal movement about an axis extending longitudinally ofsaid main frame, said wheels being carried by forks pivoted by verticalspindles rotatably mounted in upright bearings at the outer sides ofsaid sub-frame, and means for turning the forks about the axes of saidspindles simultaneously to steer the machine by the front wheels.

19. The combination of claim 18 including hydraulic motors carried bysaid forks for driving said Wheels.

20. The combination of claim 19 in which said main frame carries ahousing having a flat vertically disposed, transversely extending frontwall, said sub-frame being 1 a flat plate disposed transversely flatagainst said wall and pivoted thereto by said pivot, and guides betweenthe wall and said plate to permit said pivotal movement transversely butto prevent forward tipping of the plate.

References Cited by the Examiner JACOB L. NACKENOFF, Primary Examiner.

1. A MACHINE FOR APPLYING A VISCOUS TREATING SUBSTANCE TO A SURFACE OVERWHICH IT IS ADAPTED TO MOVE COMPRISING A FRAME CARRIED BY WHEELS FORMOVEMENT ALONG THE SURFACE TO BE TREATED, MEANS ON THE FRAME FORDEPOSITING THE TREATING SUBSTANCE ON SAID SURFACE, BRUSH MEANS FORWORKING SAID DEPOSITED SUBSTANCE ON THE SURFACE, MEANS FOR MOUNTING SAIDBRUSH MEANS ON THE FRAME BEHIND SAID DEPOSITING MEANS FOR RECIPROCATINGTRANSVERSELY OF THE FRAME AND RELATIVE TO THE NORMAL PATH OF MOVEMENTTHEREOF, AND MEANS FOR RECIPROCATING SAID BRUSH MEANS AND INCLUDING CAMMEANS ACTUATEED BY THE ROTATION OF AT LEAST ONE OF SAID WHEELS, SAID CAMMEANS COMPRISING A CAM ROTATABLE WITH THE WHEEL, A CAM FOLLOWER ENGAGINGSAID CAM AND AN OPERATIVE CONNECTION BETWEEN SAID FOLLOWER AND SAIDBRUSH MEANS.